Answer:
42 Postcards
Step-by-step explanation:
Each sheet of poster board results in 14 postcards. With 3 sheets of poster board, we have the equation 3 * 14 (3 sheets * 14 postcards) to get 42 postcards.
Answer:
x=20
Step-by-step explanation:
2x-15=x+5
minus x from both sides
x-15=5
plus 15 to both sides
x=20
check answer
2(20)-15=25
(20)+5=25
Answer:
6.5 cm
Step-by-step explanation:
Given the perimeter is 33 cm
Sum the 4 sides and equate to 33
2(3x - 1) + 2(2x + 5) = 33
6x - 2 + 4x + 10 = 33
10x + 8 = 33 ( subtract 8 from both sides )
10x = 25 ( divide both sides by 10 )
x = 2.5
Then
shorter side = 3x - 1 = 3(2.5) - 1 = 7.5 - 1 = 6.5 cm
Best answer I can find is 10%